Stimulating the vagus nerve after practice strengthened later motor learning in mice

What the research found

Study (mice). ScienceDaily carried the Tohoku University account on 5 October 2026. Junyu Chen, Yoko Ikoma, and Ko Matsui report in iScience (2026; 29(9):117413; doi 10.1016/j.isci.2026.117413), published 25 August 2026. A cuff electrode on the left cervical vagus nerve delivered stimulation after, not during, a cerebellum-dependent eye-movement task (horizontal optokinetic response). Performance did not jump during the session. On later days, stimulated mice showed stronger long-term learning. Near the cerebellar flocculus, one round of stimulation briefly lowered then raised local blood volume; repeated stimulation made that blood-volume rhythm oscillate, and larger oscillations generally lined up with better learning by day 5. The release does not give the number of mice. Vagus nerve stimulation is already used clinically for some disorders, but this protocol was an animal learning experiment, not a human skill program. Educational notes.

Evidence level: Animal study. Results in animals or cells often don't carry over to people.

Read the original at Tohoku University / iScience